CN110730521B - Electromagnetic induction heating device for nuclear power pressure container joint welding and use method thereof - Google Patents
Electromagnetic induction heating device for nuclear power pressure container joint welding and use method thereof Download PDFInfo
- Publication number
- CN110730521B CN110730521B CN201911125154.2A CN201911125154A CN110730521B CN 110730521 B CN110730521 B CN 110730521B CN 201911125154 A CN201911125154 A CN 201911125154A CN 110730521 B CN110730521 B CN 110730521B
- Authority
- CN
- China
- Prior art keywords
- heating
- induction heating
- workpiece
- induction heater
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 142
- 238000003466 welding Methods 0.000 title claims abstract description 37
- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000006698 induction Effects 0.000 claims abstract description 90
- 238000004321 preservation Methods 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000004593 Epoxy Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses an electromagnetic induction heating device for welding a nuclear power pressure container connecting tube and a use method thereof. The invention has the advantages that: the device is matched with an induction heating power supply, an extension cable and a thermocouple to realize efficient heating. According to the invention, the welding seam of the connecting pipe and the cylinder body is heated through electromagnetic induction heating, so that the temperature can be controlled more accurately, the heating efficiency is improved, the production cost is reduced, and the welding quality is improved.
Description
Technical Field
The invention relates to a heating device applied to the manufacture of nuclear power pressure vessel products, a heating device for pre-welding and post-welding heat treatment in the manufacturing process of welding a pressure vessel connecting pipe and a cylinder section, and a use method thereof, in particular to a nuclear power pressure vessel connecting pipe welding electromagnetic induction heating device and a use method thereof.
Background
The connecting pipe and the cylinder body in the pressure vessel product are connected in a welding mode, and for the welding process, the welding position of the workpiece is required to be preheated before welding, heat is preserved in the welding process, and the heat is treated after welding, so that the workpiece is required to be heated by adopting an external heat source to meet the welding process requirement. At present, when heating a workpiece, a gas mode is adopted for heating, flame of a heating calandria is directly sprayed on a welding position of a cylinder section and a connecting pipe, and as the heating calandria adopts a traditional flame heating mode, heating cannot be accurately controlled, so that the problems of uneven heating, inaccurate heating temperature, low heating efficiency, large heat radiation, poor working environment and the like are easily caused, the manufacturing cost is increased, welding defects are easily generated, and the welding quality is easily influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an electromagnetic induction heating type connecting pipe and cylinder joint assembly welding heating device which is used for solving the technical problems that the heating caused by the direct injection of flame on a heating workpiece in the existing gas heating mode cannot be controlled accurately, the heating is uneven, the heating temperature is inaccurate, the heating efficiency is low, the heat radiation is large, the quality is poor and the like.
According to the electromagnetic induction heating device for the nuclear power pressure container joint welding, the extension cable is connected with the induction heating power supply with the controller, the induction heating power supply supplies power for the induction heater, and the fixing device fixes the induction heater on a heating workpiece.
Further preferably, the heating workpiece is provided with a temperature measuring device, the temperature measuring device is connected with a controller of an induction heating power supply, the heating workpiece is accurately heated, the temperature measuring device can feed back the detected temperature of the heating workpiece to the controller, and after the temperature reaches the preheating temperature required by the process, the program is set to be in an automatic heat-preserving state, and the welding work of the heating workpiece is started.
Further preferably, the induction heater comprises an inner induction heater and an outer induction heater, each heater works independently, the inner induction heater is fixed on the inner wall of the heating workpiece, and the outer induction heater is fixed on the outer wall of the heating workpiece.
The method comprises the steps of A, adjusting the position of a heating workpiece to be convenient for installing an internal induction heater, and fixing the internal induction heater on the inner wall of the heating workpiece through a tensioning device;
B. adjusting the position of the workpiece to be convenient for installing an external reaction heater, and fixing the external induction heater on the outer wall of the heated workpiece through a jacking device;
C. the internal induction heater, the external heater and the temperature measuring device are connected with a controller of an induction heating power supply through extension cables;
D. the temperature of the heating workpiece is measured through the temperature measuring device, a temperature signal is fed back to the controller of the induction heating power supply, and when the temperature reaches the preheating temperature required by the process, the program is set to be in an automatic heat preservation state, and the welding work of the heating workpiece is started.
Further preferably, the fixing device comprises a tensioning device and a propping device, the tensioning device is used for fixing the internal induction heater on the inner wall of the heating workpiece, and the propping device is used for fixing the outer wall induction heater on the outer wall of the heating workpiece.
Further preferably, the tensioning device comprises a pull rod assembly and a pull rod support, the pull rod assembly comprises a plurality of pull rods, one ends of the pull rods are connected with the pull rod support, the other ends of the pull rods are connected with the internal inductor, and the internal inductor is fixed on the heating workpiece through adjustment of the pull rods.
Further preferably, the jacking device comprises a jackscrew assembly and a jackscrew support, wherein the jackscrew assembly is fixed on the jackscrew support, and the external flexible inductor is fixed outside the heating workpiece through the jackscrew assembly.
Further optimizing, inside induction heater adopt rigid structure, adopt the mode of the fan-shaped integrated configuration of cylinder, including the fan-shaped integrated rigid frame of cylinder, electromagnetic induction heating cable, heat preservation cloth, fixed connection buckle, constitute overall structure with each part through the screw, the fan-shaped integrated rigid frame of cylinder is used for arranging induction heating cable above that, the main part material is high strength epoxy mica board, connects through the aluminum alloy piece and constitutes overall frame, fixed connection buckle is fixed electromagnetic induction heating cable, heat preservation cloth winding is outside electromagnetic induction heating cable, heat preservation cloth is used for insulating against heat, and inside induction heater is equipped with quick connector.
Further optimizing, the outer wall induction heater adopts a flexible heating belt structure, and the flexible heating belt can freely change the shape according to the shape of a heating workpiece; the electromagnetic induction heating cable is arranged inside the flexible heating belt, the electromagnetic induction heating cable is fixed through the fixed connection buckle, the heat preservation cloth is wound outside the electromagnetic induction heating cable and is fixed into an integral structure through the high-temperature resistant wire, the heat preservation cloth is used for heat insulation, and the external induction heater is provided with a quick connector.
Further optimizing, electromagnetic induction heating cable intermediate frequency low loss litz high temperature resistant package line preparation, high temperature resistant 300 ℃, adopt air cooling litz cable, the cable core comprises 2500 high temperature resistant package lines, fixed connection buckle be the dicyclo structure, epoxy material, thermal insulation cloth adopt high silica material line to compile, high temperature resistant 1000 ℃ more.
The invention has the advantages that: the device is matched with an induction heating power supply, an extension cable and a thermocouple to realize efficient heating. According to the invention, the welding seam of the connecting pipe and the cylinder body is heated through electromagnetic induction heating, so that the temperature can be controlled more accurately, the heating efficiency is improved, the production cost is reduced, and the welding quality is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the invention for welding and heating a joint pipe of a nuclear power pressure vessel.
Fig. 2 is a schematic view of an induction heater apparatus of the present invention.
The marks in the figure: 1-heating a workpiece; 2-an internal induction heater; 2-1 a cylindrical sector combined rigid frame; 2-2 induction heating cable; 2-3, fixedly connecting the buckle; 2-4 of heat preservation cloth; 3-an external induction heater; 3-1 induction heating cable; 3-2, fixedly connecting the buckle; 3-3, heat preservation cloth; 4-tensioning devices; 4-1 a pull rod assembly; 4-2 pull rod supports; 5-propping device; 5-1, tightly pushing the support; 5-2 jackscrew assembly.
Detailed Description
The electromagnetic induction heating device for welding the nuclear power pressure container joint pipe and the using method thereof are further described below with reference to the accompanying drawings.
The electromagnetic induction heating device for the nuclear power pressure container joint pipe welding is shown in fig. 1, and is a schematic use diagram of the electromagnetic induction type pressure container joint pipe welding heating device, and comprises a heating workpiece 1, an inner induction heater 2, an outer induction heater 3, a tensioning device 4 and a jacking device 5.
As shown in fig. 2, the internal induction heater 2 comprises a cylindrical fan-shaped combined rigid frame 2-1, induction heating cables 2-2 and 3-1, fixed connection buckles 2-3 and 3-2 and heat preservation cloths 2-4 and 3-3, and all the components are formed into an integral structure through screws; the external induction heater 3 comprises induction heating cables 2-2 and 3-1, fixed connection buckles 2-3 and 3-2 and high-temperature cloth, and is fixed into an integral structure through a high-temperature resistant wire; the tensioning device 4 comprises a pull rod assembly 4-1 and a pull rod support 4-2; the jacking device 5 comprises a jackscrew assembly 5-2 and a jackscrew support 5-1.
According to the electromagnetic induction heating device for the nuclear power pressure container joint welding, the extension cable is connected with the induction heating power supply with the controller, the induction heating power supply supplies power for the induction heater, and the fixing device is used for fixing the induction heater on the heating workpiece 1. The heating workpiece 1 is provided with a temperature measuring device which is connected with a controller of an induction heating power supply to realize accurate heating of the heating workpiece 1, the temperature measuring device can feed back the detected temperature of the heating workpiece 1 to the controller, and after the temperature reaches the preheating temperature required by the process, the program is set to be in an automatic heat-preserving state to start welding work on the heating workpiece 1. The common temperature measuring device adopts a thermocouple.
In order to heat the heating workpiece 1 more uniformly, the induction heater is divided into an inner induction heater 2 and an outer induction heater 3, the heaters work independently, the inner induction heater 2 is fixed on the inner wall of the heating workpiece 1 through a pull rod of a tensioning device 4, the tensioning device 4 comprises a pull rod assembly 4-1 and a pull rod support 4-2, the pull rod assembly 4-1 comprises a plurality of pull rods, one end of each pull rod is connected with the pull rod support 4-2, the other end of each pull rod is connected with an inner inductor, and the inner inductor is fixed on the heating workpiece 1 through pull rod adjustment. The external induction heater 3 is fixed on the outer wall of the heating workpiece 1 through a jackscrew assembly 5-2 of a jacking device 5, the jacking device 5 comprises the jackscrew assembly 5-2 and a jackscrew support 5-1, the jackscrew assembly 5-2 is fixed on the jackscrew support 5-1, and an external flexible inductor is fixed outside the heating workpiece through the jackscrew assembly 5-2.
The internal induction heater 2 adopts a rigid structure and adopts a cylindrical fan-shaped combined structure mode, and comprises a cylindrical fan-shaped combined rigid frame 2-1, induction heating cables 2-2 and 3-1, heat preservation cloths 2-4 and 3-3 and fixed connection buckles 2-3 and 3-2, wherein the cylindrical fan-shaped combined rigid frame 2-1 is used for arranging the induction heating cables 2-2 and 3-1 thereon, a main body is made of a high-strength epoxy resin mica plate, the induction heating cables 2-2 and 3-1 are connected through aluminum alloy blocks to form an integral frame, the fixed connection buckles 2-3 and 3-2 fix the induction heating cables 2-2 and 3-1 on the cylindrical fan-shaped combined rigid frame 2-1, the distance between the adjacent induction heating cables 2-2 and 3-1 is ensured to be 10mm, the heat preservation cloths 2-4 and 3-3 are wound outside the induction heating cables 2-2 and 3-1, and the heat preservation cloths 2-4 and 3-3 are used for heat insulation. The heat preservation cloth 2-4, 3-3 fixes the induction heating cables 2-2, 3-1 on the cylindrical fan-shaped combined frame, and all the components form an integral structure through screws. For convenient plugging, the inner induction heater 2 is provided with a quick plug. The outer wall induction heater adopts a flexible heating belt structure, and the flexible heating belt can freely change the shape according to the shape of the heating workpiece 1; the induction heating cables 2-2 and 3-1 are arranged inside the flexible heating belt, the induction heating cables 2-2 and 3-1 are fixed by the fixed connection buckles 2-3 and 3-2, the heat preservation cloth 2-4 and 3-3 is wound outside the induction heating cables 2-2 and 3-1, and the heat preservation cloth 2-4 and 3-3 is used for heat insulation. The heat preservation cloth 2-4, 3-3 is wrapped by the induction heating cable 2-2, 3-1 fixedly connected with the buckle 2-3, 3-2 and then is fixed into an integral structure through a high temperature resistant wire. For convenient plugging, the external induction heater 3 is provided with a quick plug.
The induction heating cables 2-2 and 3-1 are manufactured by medium-frequency low-loss litz high-temperature resistant wrapping wires, the high temperature resistance is 300 ℃, the air cooling litz cable is adopted, a cable core consists of 2500 high-temperature resistant wrapping wires, the fixed connection buckles 2-3 and 3-2 are of double-ring structures, the epoxy resin materials and the heat preservation cloths 2-4 and 3-3 are woven by high-silica material wires, and the high temperature resistance is more than 1000 ℃.
The using method of the electromagnetic induction heating device for nuclear power pressure container joint welding comprises the steps of A, adjusting the position of a heating workpiece 1 to be convenient for installing an internal induction heater 2, and fixing the internal induction heater 2 on the inner wall of the heating workpiece 1 through a tensioning device 4;
B. The position of the workpiece is adjusted to be convenient for installing an external reaction heater, and the external induction heater 3 is fixed on the outer wall of the heating workpiece 1 through the jacking device 5;
C. The internal induction heater 2, the external heater and the temperature measuring device are connected with a controller of an induction heating power supply through extension cables;
D. the temperature of the heating workpiece 1 is measured by the selected thermocouple temperature measuring device, a temperature signal is fed back to the controller of the induction heating power supply, and when the temperature reaches the preheating temperature required by the process, the controller sets a program to be in an automatic heat-preserving state, and the welding work of the heating workpiece 1 is started.
The foregoing has shown and described the basic principles, principal structures and advantages of the invention. It will be appreciated by those skilled in the art that variations and modifications in size and orientation, etc. may be made to the invention without departing from the spirit and scope of the invention, and that such variations and modifications are within the scope of the invention as claimed.
Claims (3)
1. Electromagnetic induction heating device for nuclear power pressure vessel joint welding, which is characterized in that: the extension cable is connected with an induction heating power supply with a controller, the induction heating power supply supplies power for the induction heater, the induction heater is fixed on a heating workpiece by a fixing device, a temperature measuring device is arranged on the heating workpiece, the temperature measuring device is connected with the controller of the induction heating power supply, the induction heater comprises an internal induction heater and an external induction heater, the heaters work independently, the internal induction heater is fixed on the inner wall of the heating workpiece through a tensioning device of the fixing device, the internal induction heater adopts a rigid structure and comprises a cylindrical fan-shaped combined rigid frame, an electromagnetic induction heating cable, heat insulation cloth and a fixed connection buckle, and all components are formed into an integral structure through screws; the cylindrical fan-shaped combined rigid frame is used for arranging an induction heating cable on the cylindrical fan-shaped combined rigid frame, the main body is made of a high-strength epoxy resin mica plate, and the high-strength epoxy resin mica plate is connected through an aluminum alloy block to form an integral frame; the electromagnetic induction heating cable is fixed by the fixed connection buckle; the heat preservation cloth is wound outside the electromagnetic induction heating cable, and the internal induction heater is provided with a quick connector; the external induction heater is fixed on the outer wall of a heating workpiece through a jacking device of a fixing device, the external wall induction heater adopts a flexible heating belt structure, an electromagnetic induction heating cable is arranged inside the flexible heating belt, a fixed connection buckle fixes the electromagnetic induction heating cable, heat preservation cloth is wound outside the electromagnetic induction heating cable and is fixed into an integral structure through a high-temperature resistant wire, the external induction heater is provided with a quick connector, a tensioning device comprises a pull rod assembly and a pull rod support, the pull rod assembly comprises a plurality of pull rods, one ends of the pull rods are connected with the pull rod support, the other ends of the pull rods are connected with an internal inductor, the internal inductor is fixed on the heating workpiece through pull rod adjustment, the jacking device comprises a jackscrew assembly and a jackscrew support, and a jackscrew assembly is fixed on the jackscrew support, and the external induction heater is fixed outside the heating workpiece through the jackscrew assembly.
2. The use method of the electromagnetic induction heating device for welding the nuclear power pressure vessel joint pipe according to claim 1, which is characterized in that: A. adjusting the position of the heating workpiece to be convenient for installing the internal induction heater, and fixing the internal induction heater on the inner wall of the heating workpiece through a tensioning device;
B. adjusting the position of the workpiece to be convenient for installing an external reaction heater, and fixing the external induction heater on the outer wall of the heated workpiece through a jacking device;
C. the internal induction heater, the external heater and the temperature measuring device are connected with a controller of an induction heating power supply through extension cables;
D. the temperature of the heating workpiece is measured through the temperature measuring device, a temperature signal is fed back to the controller of the induction heating power supply, and when the temperature reaches the preheating temperature required by the process, the program is set to be in an automatic heat preservation state, and the welding work of the heating workpiece is started.
3. The electromagnetic induction heating device for nuclear power pressure vessel joint welding of claim 1, wherein: the electromagnetic induction heating cable medium-frequency low-loss litz high-temperature-resistant wrapping wire is manufactured, the temperature is resistant to 300 ℃, an air cooling litz cable is adopted, a cable core is composed of 2500 high-temperature-resistant wrapping wires, the fixed connection buckle is of a double-ring structure and made of epoxy resin, and the heat preservation cloth is woven by high-silica material wires and is resistant to the temperature of more than 1000 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125154.2A CN110730521B (en) | 2019-11-18 | 2019-11-18 | Electromagnetic induction heating device for nuclear power pressure container joint welding and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125154.2A CN110730521B (en) | 2019-11-18 | 2019-11-18 | Electromagnetic induction heating device for nuclear power pressure container joint welding and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110730521A CN110730521A (en) | 2020-01-24 |
| CN110730521B true CN110730521B (en) | 2024-07-05 |
Family
ID=69225275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911125154.2A Active CN110730521B (en) | 2019-11-18 | 2019-11-18 | Electromagnetic induction heating device for nuclear power pressure container joint welding and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110730521B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143925B (en) * | 2021-12-02 | 2023-08-11 | 渤海造船厂集团有限公司 | Multipath intelligent control induction heating device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201307947Y (en) * | 2008-04-29 | 2009-09-09 | 吕方 | Intermediate frequency induction pipeline thawer |
| CN204918669U (en) * | 2015-07-09 | 2015-12-30 | 昆山土山***件有限公司 | Outer hole induction hardening equipment in wheel body and function |
| CN211378300U (en) * | 2019-11-18 | 2020-08-28 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Electromagnetic induction heating device for assembling and welding nuclear power pressure vessel connecting pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071947B (en) * | 2017-06-14 | 2023-07-21 | 青岛海越机电科技有限公司 | Electromagnetic induction heating method for build-up welding of inner wall of large-scale seal head |
| CN207877780U (en) * | 2018-01-29 | 2018-09-18 | 中国核工业第五建设有限公司 | A kind of pipeline welding superaudio electromagnetic induction heater |
-
2019
- 2019-11-18 CN CN201911125154.2A patent/CN110730521B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201307947Y (en) * | 2008-04-29 | 2009-09-09 | 吕方 | Intermediate frequency induction pipeline thawer |
| CN204918669U (en) * | 2015-07-09 | 2015-12-30 | 昆山土山***件有限公司 | Outer hole induction hardening equipment in wheel body and function |
| CN211378300U (en) * | 2019-11-18 | 2020-08-28 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Electromagnetic induction heating device for assembling and welding nuclear power pressure vessel connecting pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110730521A (en) | 2020-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI391222B (en) | Tire and sulfur machine | |
| CN104259272B (en) | A kind of eddy-current heating stretch wrap forming device for aircraft section bar | |
| CN108517398B (en) | Post-welding heat treatment device for large-pipe-diameter thin-wall pipe and use method thereof | |
| CN110730521B (en) | Electromagnetic induction heating device for nuclear power pressure container joint welding and use method thereof | |
| CN101448347B (en) | Method for manufacturing induction coil used for medium frequency induction heating | |
| CN110681966A (en) | Pipeline welding heating device, welding device and method | |
| CN106862753A (en) | A kind of method and device that can reduce agitating friction welded blank residual stress | |
| CN211378300U (en) | Electromagnetic induction heating device for assembling and welding nuclear power pressure vessel connecting pipe | |
| US2480315A (en) | Method and apparatus for making pipe bends and the like | |
| CN106984880A (en) | A kind of stellite linear leaf automatic brazing system and method | |
| CN202090028U (en) | Heating device used for realizing thermal treatment of fillet welds of small-diameter tubes | |
| CN108790361B (en) | Heating device of laminating machine and control method thereof | |
| CN103269534B (en) | Flexible fabricated induction heater | |
| CN211111691U (en) | One-stop type intermediate frequency heating 3D vehicle-mounted glass hot bending machine structure | |
| CN207877780U (en) | A kind of pipeline welding superaudio electromagnetic induction heater | |
| CN211414001U (en) | Pipeline welding heating device and welding device | |
| CN204578810U (en) | The explosion-proof energy-saving electromagnetic heating rod of container | |
| CN217499361U (en) | Pressure pipeline welded joint heat treatment device | |
| CN208440677U (en) | A kind of Large Diameter Pipeline thin-wall tube post weld heat treatment device | |
| CN201042086Y (en) | Heating device for inductive instrument | |
| CN111979400A (en) | High-temperature heating surface welded junction and fin weld seam postweld heat treatment device and manufacturing method | |
| CN207382618U (en) | A kind of electromagnetism section heating type screw rod cracking apparatus | |
| KR101782099B1 (en) | Hot water generator | |
| CN217499360U (en) | Large-size pressure pipeline welding heating coil device | |
| CN203435179U (en) | Intermediate-frequency closed coil heater and intermediate-frequency closed dual-coil heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |